Search Tags: Cleveland Clinic
A football player is constantly taking blows to the head. Most are not strong enough to cause a concussion, but there is growing evidence a series of lesser hits could do significant damage.
Sunday - 03/10/2013, 04:37pm EDT
, April 24, 2014
Now: 47 °FTonight: Partly cloudy
Hi: 66 °F | Lo: 42 °F